body{
    background-color: #000000;
    color: #fff;
    box-sizing: border-box;
	font-size: 0.8em;
}
.flex{
	display: flex;
}
.flex-center{
	@extend .flex;
	justify-content: center;
	align-items: center;
}
.flex-lr{
	@extend .flex;
	justify-content: space-between;
	align-items: center;
}
.flex-end{
	@extend .flex;
	justify-content: flex-end;
	align-items: center;
}
.flex-align-center{
	@extend .flex;
	align-items: center;
}
.flex-y-center{
	display: flex;
	flex-direction: column;
	align-items: center;
}
// 不换行
.nowarp{
	white-space: nowrap;
}